ʻAtikala e pili ana i ke kahua umekaumaha a me ka ikaika o ke kahua umekaumaha
Ke paʻi ʻoe i kahi puke ma luna o ka papaʻaina a hiki i ka neʻe ʻana o ka puke, hoʻopā kou lima i ka puke. Pēlā nō, ke nakinaki ʻoe i kahi mea me kahi ʻāpana kaula, a laila huki a hiki i ka neʻe ʻana, hoʻopā kou lima i ke kaula, hoʻopā ke kaula i ka mea. I kēia hihia, ʻo ka ikaika paʻi, ka ikaika huki, ka ikaika uʻi o ke kaula, a me nā ikaika e like me kēia ua kapa ʻia he mau ikaika hoʻopā a i ʻole nā ikaika pili. ʻO ka ikaika umekaumaha o ka Honua e huki ana i ka hua e hāʻule ana i ka ʻili o ka honua. A i ʻole, ʻo ka ikaika umekaumaha o ka honua e huki ana i ka mahina i ke kaʻapuni o ka honua e hana ʻia me ka ʻole o ka hoʻopā ma waena o ka honua a me ka hua a me ka mahina.
No laila, ua kapa ʻia nā mana umekaumaha a i ʻole nā mana e like me kēia he mau mana hoʻopā ʻole. Pehea lā e hāʻule ai nā hua a "hāʻule" ka mahina i ka honua me ka ʻole o ka hoʻopā ʻana ma waena o ka honua a me nā hua a me ka mahina? Ua paʻakikī i nā kānaka ʻepekema, me Newton pū kekahi , ke noʻonoʻo i ke kumumanaʻo o ka mana hoʻopā ʻole. I mea e maʻalahi ai ke noʻonoʻo a me ka hoʻomaopopo ʻana i ke kumumanaʻo o ka mana hoʻopā ʻole, ua hāpai ʻia ke kumumanaʻo o ke kahua.
Kahua umekaumaha
Ke waiho kahi mea me ka nuipaʻa i ka lewa, hoʻopuka ka mea i kahi kahua umekaumaha. Ua hōʻike ʻia ke kahua umekaumaha o kahi mea me ka nuipaʻa m ma ke ʻano o nā laina kahua, e like me ka mea i hōʻike ʻia ma ke kiʻi ma lalo nei.
ʻO ka mamao aku mai ka ʻili o ka mea, ʻoi aku ka mamao ma waena o nā laina o ke kahua umekaumaha. Akā, ʻo ka kokoke aku i ka ʻili o ka mea, e kokoke mai ana ka mamao ma waena o nā laina kahua. ʻO ka kokoke aku, ʻoi aku ka nui o ka ikaika o ke kahua umekaumaha. ʻO ka mamao aku, e liʻiliʻi ana ke kahua umekaumaha. Pēlā nō, ʻo ka nui o ka nui o nā mea, ʻoi aku ka kokoke a me ka kokoke o nā laina kahua umekaumaha. Inā e kau ʻia kahi ʻāpana hoʻāʻo kokoke i kahi mea e hana ana i kahi kahua umekaumaha, e ʻike ka ʻāpana hoʻāʻo i kahi ikaika umekaumaha. ʻO ke kuhikuhi o ka ikaika umekaumaha i ke kikowaena o ka mea e hana ai i kahi kahua umekaumaha.
ʻO ka mamao aku mai ka ʻili o ka mea, ʻoi aku ka mamao ma waena o nā laina o ke kahua umekaumaha. Akā, ʻo ka kokoke aku i ka ʻili o ka mea, e kokoke mai ana ka mamao ma waena o nā laina kahua. ʻO ka kokoke aku, ʻoi aku ka nui o ka ikaika o ke kahua umekaumaha. ʻO ka mamao aku, e liʻiliʻi ana ke kahua umekaumaha. Pēlā nō, ʻo ka nui o ka nuipa o kahi mea, ʻoi aku ka nui a me ka kokoke o nā laina kahua umekaumaha.
Inā kau ʻia kahi ʻāpana hoʻāʻo kokoke i kahi mea e hoʻopuka ai i kahi kahua umekaumaha, e ʻike ka ʻāpana hoʻāʻo i kahi ikaika umekaumaha. ʻO ke kuhikuhi o ka ikaika umekaumaha i ke kikowaena o ka mea e hoʻopuka ai i kahi kahua umekaumaha.
Ka ikaika o ke kahua umekaumaha
ʻO ka ikaika o ke kahua umekaumaha o ka honua i ʻike ʻia e kahi mea ma luna o ka ʻili o ka honua:
g = ka ikaika o ke kahua umekaumaha
F g = ka ikaika o ke kaumaha
m B = ka nuipa o ka honua
R B = ka radius o ka honua = 6.37 x 10 6 m
h = ke kiʻekiʻe o nā mea ma luna o ka ʻili honua
Inā makemake mākou e helu i ka ikaika o ke kahua umekaumaha o kahi ka honua, ka nuipa, a me ka radius o ka honua (mB a a RB) ua pani ʻia e ka nuipa a me ke anawaena o ka mahina a i ʻole ka nuipa a me ke anawaena o kahi hōkūhele kikoʻī.
Inā mākou e nānā i ka neʻe ʻana o kahi mea ma luna o ka ʻili o ka honua, a laila ʻike ʻia ʻo ia ka wikiwiki o ka umekaumaha o ka honua i ʻike ʻia e ka mea, ʻo ia hoʻi ʻo 9.8 m/s 2. Inā aia nō ka mea ma luna o ka ʻili o ka honua (ʻaʻole hāʻule manuahi nā mea), a laila ʻike ʻia ʻo g ʻo ia ka ikaika o ke kahua umekaumaha o ka honua i ʻike ʻia e ka mea, ʻo ia hoʻi ʻo 9.8 N/kg.
